Scraper elevating and lowering mechanism



March 16 1926.

. R. H. STALEY scRAPEn ELEVATING AND LowEmNG MECHANISM Filed Dec. s 4 sheets-sheet 1 March 16 1926.

` R. H. sTALEY SCHAPER ELEVATING AND LOWERING MECHANISM Filed Dec. 5, 1924 4 Sheets-Sheet 2 Ma-.rch 16 1926.

R. H. STALEY SCRAPER ELEYATING AND LOWERING MECHANISM Filed Dec. 5, 1924 4 Sheets-Sheet 5 EN NN.

March 16 1926K R. H. STALEY scRAPER ELEVATING AND LowERING MEcHANIsM Filed Deo. 5, 1924 4 Sheets-Sheet 4 Patented Mar.

UNITED fsTATEs PATENT OFFICE.

RALEIGH II. sTALR'Ir, or SPRINGFIELD, ILLINOIS, AssIGNoR To THE PARER MANU- FACTURING COMPANY, on IsPRINGPIRLn, ILLINOIS, A CORPORATION or ILLINOIS.

` scRAPRR IILEVA'IING aN'ngLowERING MECHANISII.

7 r Appnmmn mea December s, i924. serial Na 753,718.

. To all whom z't may concern:

Pig. 2 is a side elevation showing ai@ Be it known that I, RALEIGH STLRY, @scraper blade in raised position.

a citizen of the United States, residing at Springfield, in the county of Sangamon and State of Illinois, have invented certain new and useful Improvements in Scraper Elevating and Lowering Mechanism, of which the following is a specification, reference being lhad therein to the accompanying drawing.

My invention relates to new and useful improvements in a. device or mechanism for raising and lowering the scraper blade of graders, Scrapers, snow plows, bulldozers, back fillers, or the like, and more particularly Itosuch a device or mechanism which is automatically operated by the movement of the machine, of the above character, to which it isattached.

The principal object ofthe invention is the provision of elevating and lowering mechanism of sueha character that as the machine moves forward in its scraping direction that the scraper blade will be lowered but when the machine is moved rearwardly the sera er blade will be raised.

A further ob]eet of the invention resides in the provision of means whereby the elevating and lowering mechanism may beloeked or held in either of its positions or in other words fin aposition to hold the scraper blade' elevated or in a position to hold the sera r blade lowered.

` With the a )ove and other objects in view, which will appear as the description proceeds, my invention consists in the novel details of construction, and arrangement of parts, described in the following specification and illustrated in the accompanyingdrawings, and while I have illustrated and described the `preferred,embodiments of the invention, as they now appear to me lit will be understood that such changes may be made as, will fall within the scope ot the ap nded claims.

n the drawin s: Figql is a si e elevation with parts in 'section showing the blade in lowered position. l

transverse section.

Fig. 3 is a top away.

Fig. 4 is a front view-with parts shown in plan with parts broken section and parts shown .diagrammatically Fig. 5 is a detailed perspective of one of the runners and its associate plates and rollers, the runnerhaving partsshown in Fig.` 6 is a`side elevation illustrating a slightly modified form of elevating and lowering device.

In the -drawings A denotes generally a machine such as a grader, scraper, snow sary. 'Connected to the machine, 'preferably Y adjacent the rear end. thereof, is a tractor drawbar 1 to which is secured by means of the plates 2 a frame which extends entirely around the machine, said frame comprising, the side beams 3 the rear end beam/1, and the front beam 5 to which the scraper blade 6 is secured. The `plates 2 areconnected to the draw bar 1 by means ofthe bolts'7 or other suitable fastening means and to the rear end beam 4 of the. frame by means of the bolts or other securing devices 8. It will thus be seen that the rear end of the-frame is connected to the machine whereas 'the forwardend is adaptedfor verticalmovement being normally held in its lm'vered postlion.

with the blade 6 in contact with the ground or vother surface by gravity.

Secured to the top of-eaeb of the side beams 3 of the frame, preferably adjacent' the forward ends thereof,'are the vertically extending standards 9 -and 10,the standard 10 being of a somewhat greater height than the standard. 9 for a purpose which will readily appear'. The standards ,are secured to the top of theV4 beams 3 by means of the bolts 11 or other suitable securing devices ard 10. s

Runners are shown-at and are adaptedl lto contact with the ground or othersurface at all times, each of said runners 15 having vertically extending plates 16 secured thereto, said plates extending on opposite sides of the side beams '3, as quite clearly l Aillustrated in the drawings, andsbeing of a l ably height asfto preferably reach to a point adjacent the top of the 'uppertrack 13. Rotatmounted or connected betweenv the plates 16, adjacent the upper edges thereof` are the longitudinally spaced rollers 17 which engage between the tracks 13 and 14,

.the yrollers 'having anges 17 formed on their ends and the forward roller being on a somewhat lower level than `the rear roller. When the scraper blade is in lowered position the rear roller will engage the standard 10 and when the scraper blade is in its raised position the forward roller will engage the standard 9. The runners 15L have the yupwardly extending flanges 15 provided with the shoulders 16 upon which the lower edges of the lates 16 are` received. Secured to the outer ace of each of the outer plates 16 is a bearing or guide plate 18 to which one end of a lever 19 is pivotally connected at 20. The lever is formed at its upper end with the hand-hold 21 and isprovided in its lower edge with the notches 22 and 23,

Y said notches 22 and 23 receiving, when desired, the transversely extending pin 24sup` 'A for engagement with the ground I pr ported in the U-shaped bearing 25 whichv in turn is secured to the top of the beams 3 by means of the bolts 26 or other suitable fastenings. Each of the outer plates 16 has an opening 27 formed therein, said opening receiving apin 28 which engages the notched edgefklof the lever 19 to lustrated in Figs. 1 and 2 of the drawings, with' the notches 22 and 23 disengaged from vthe transversely extending pin 24.

In Fig. 6 of the drawings I have shown a slightly modified form of device for raising or lowering the frame. In this form. of the invention insteadv of having the runnes thel rollers or wheels 29 whichvare rotatably mounted between the plates 16 adjacenttheir lower 'edges and extend below" the lower edge thereof, and engage the ground or other surface over which the machine is passing. Secured to each ofthe .wheels or rollers 29 is a ratchet wheel 30 and engaging each of the ratchet wheels is apawl 31 to which rods orv levers 32 are connected.- The teeth of the ratchet wheelsy 30 extend in such hold the lever in elevated position, as more clearly 'ila direction that the wheels are adapted to rotate-as the machine is moved forward but when the machine is moved rearwardly the pawls 31 hold the wheels against rotation thereby causing friction upon the ground or other surface toy hold the plates 16 stationary` until the machine is moved in such a position that the front rollers 17 carried by vthe plates'engage the standard 9.-

- Having fully'described the detailed construction of both the preferred and modified forms of'my invention I will now endeavor to somewhat more clearly bring o ut the operation. It is a well known fact that vin the use of machines of various characters employing scraper` blades that it is often necessary for the machine to `be moved rearwardlyp'or backed up to make a fresh start or to be moved to a different location and when this is done it is preferable to be able to' raise the scraper blade so that the dirt or other material will not be drawn rearwardly by the machine and when the machine is again moved forwardly it is desired that ,the scraper 'blade be lowered. It can readily be appreciated that advantages are secured by having this raising and lowcring mechanism automaticall operated so that the operator of the mac ine may give his full attention to manipulation of the machine and does not have the additional burden of operating the raising and lowering mechanism. In Fig. 1 of the drawings I have illustrated the raising and lowering.

mechanism in position when the machine .is being moved forwardly or in its scraping operation with the blade in contact with the ground. As has been stated the runners 15 will always contact with the ground or other surface and with the scraper blade lowered'the rollers 17 carried by the plates 16, will be engaged with the highest points of the track 13 and 14 and the rear'rollers in engagement with the standards 10. The engagement of the rollers with the 'standards 10 cause the runners and plates to be moved forwardly with the machine it being understood that the traction of the machine is such that the frictional contactwith the ground or other surface isV overcome. When the machine is moved rearwardly the friction of the runners with the ground or other object is suiicient to hold the plates 16 with their associated ,rollers stationary and the movement of the 'machine will cause the'inclined tracks 13 and 14 to-be moved over the rollers, such movement raisingthe forward end of the frame and the scraperblade 6 upwardly, this being accomplished by the factv rameau i and the rollers 17 and will allow the inclinedl tracks 13 and 14 to pass thereover in a forward direction .theforward end of the' f rame y andthe. scraper blade being lowered during such movement until the rear rollers17 contact with the standards I10 when-the runners and their associated mechanisms will move forwardly with the machine. The levers 19 are normally held in the raised position shown in Figs. 1 and 2 by the pins 28 to allow the movements of thev raising and loweringmechanism-as above described. At times it might be desired to hold the raising and lowering mechanism in either of its positions and when-this is desired the pins 28 may be removed so that the .levers 19 `may be lowered with their lower edges received in between the side of the U-shaped bearing 25 so that either the notch 22 or the notch 23 will engage the transverselyex-i tending pins 24. When it ,is desired to hold the scraper blade raised the pins 28 will be received in the notches 23 of the levers 19` and when it isdesired to hold lthe raising and-lowering vmachanism with the scraper blade lowered the notches 22 of the levers 19 will receive the `transversely extending pins 24. l

The operation of the modified `form of the invention as ,shown in Fig. 6 is substantially the same as that above described ex- -'cept that I use the wheels or rollers 29 instead of the runners 15. 'lhe wheels or rollersi29 will freely 'rotateas the machine is moved forwardly but as the machire is moved rearwardly the pawlsv 31 will hold them against rotation, thereby causing such -frictional engagement with the yground 'or other object as vto hold the plates 16 and rollers 17 stationary so `as the tracks 13 and 14 will pass thereover and raise and lower the frame and scraper blade as has rlhe pawls 31v been previously described. may be disengaged `from the ratchet wheels 30 by means ot the rods or levers"82.

Having fully described my invention what desire lto securcby Letters .Patent is:

lmThe combination with a machine of the character described including a movabley frame and a scraping blade connected thereto, ot' a track carried bythe frame, and means enffageable with the track and operable by the movement of the machine for raising and lowering the blade,

'2. The combination with a machine lof the character described including a movable frame and a scraping blade connected thereto, of an inclined track carried by the frame, and means engageable with the r'track and operable by the movement of the machine for raising and' lowering the blade.

3.- The combination with a machine of' the character ldescribed having a movable frame and a scraper blade connected thereto, of a track carried by the frame, and a member engageable with the surface 'over which the machine is passed' and engageable with the track for raising and lowering the scraper blade upon movement of the machine. l

4; Thecombination with a. machine of the character described having a movable frame and a scraper blade carried by the frame, of a track carried by the frame,'a'nd means engageable with the track for raising the scraper blade upon movement of the machine in one direction and lower the scraper blade upon movement of themachine in the opposite direction.

5.fThe combination with a machine of the character described havin a movable frame and a blade connected t creto, 'of anv inclined track carried by the frame, and means engageable with the surface over whichthe machine is passed and engageable' with the inclined track whereby the frame and its associated .scraper blade will.l be raised as the machine is moved in one direction and lowered when the machine is lmovable in the op osite direction.

6. The ,com ination` with a machine of the character described having a movable frame and a scraper blade 4carried thereby, of 'a track carried b theiframe la plate, a roller carried'b t e plate andengageable with the trae and a member carried by the lplate and engageable with the'sur` 4and movable longitudinall of the frame for raising and loweringthe lade.

8. The combination with a machine of the character described includinga vertically movabledrame and a scraping blade connected thereto, of means ,engageable with the groundand movable lloni udinally of the frame for raising and owering the blade.

y9. The combination with 'amachine of the character, described including a movable frame and a scrapin blade connected thereto, of means engagea le with the ground and movable longitudinally of the frame for .raising and loweringthe blade, and meansI engageable betweenthe frame and movable member `for holdin the movable vmember in position with the b ade raised.

10, The comb'nation Wlth a machine of the character described including a. movable 5 frame and a scraping blade connected there to, of means engageable with the ground and movable longitudinally of the frame for raising and lowering the blade, and

means carried by the movable member and enga eable with the fralvmayfor holding said 10 mova le member in position with the frame raised.

, In testimony whereof I hereunto aix my signature,

RALEIGH H. STALEY. 

